Sampling News

I want to ask if news programs are in public domain or not. My plan is to sample some headlines regarding to the Lehman Brothers collapse and it consequences (bear with me, this is a theme for a track). If I sample, for example, CNBC or CNN (which has already been broadcasted) is that public or not since in essence it is still news?

I want to ask if news programs are in public domain or not. My plan is to sample some headlines regarding to the Lehman Brothers collapse and it consequences (bear with me, this is a theme for a track). If I sample, for example, CNBC or CNN (which has already been broadcasted) is that public or not since in essence it is still news?